Question

The diameter of your bicycle wheel is 25 inches. How far will you move in one turn of your wheel?

Answer 1

$diameter=2radius\\ Perimeter= 2 \pi r\\ 25=2radius\\ radius=12,5\\ Perimeter=2* \pi *12,5=25 \pi =78,5\\78,5 \ inch \ I\ can\ move.$

Answer 2

$2\pi*r=2*3,1415*\frac{1}{2}*25=78,5$ inches